.header{
	background: url("../img/header_bg.jpg") repeat;
	background-repeat: no-repeat;
	
}

.index_des{
	background-color: #8EA5C4;
	filter:alpha(opacity=80); 
	-moz-opacity:0.8; 
	opacity:0.8;
	width: 950px;
	margin-left: auto;
	margin-right: auto;
	position:absolute;
	top:40%; 
	left:16.5%;
}

.thumbnail_img_width{
	width: 160px;
	margin-left: auto;
	margin-right: auto;
}

.padding-middle {
    padding: 30px;
}